Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b0a36c2ee763c0…

MALICIOUS

PDF

66.7 KB Created: 2021-03-23 14:04:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a4ff26c7c6e6f2ae6a8c59025f770c36 SHA-1: 6a79f16a7d9604e232696dd1d425922aae70f6e8 SHA-256: a9b0a36c2ee763c0ff6f6d7d12c2442081d0b2cf9c588a2d1cb7594d7a209d50
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple external URIs, with one specifically pointing to a URL that appears to be a lure for a game ('4 pics 1 word'). The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/strik?utm_term=4+pics+1+word+level+2403 PDF link annotation
    • https://cdn.sqhk.co/josipinu/hd7G9ge/canvas_parent_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzosiboweja/uHihgd9/juwatojevujanuzuzibis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464874/normal_5fc7be1a69545.pdfIn PDF document text
    • https://cdn.sqhk.co/rogotojuseb/hggo2hS/left_4_dead_2_mod_minecraft_download.pdfIn PDF document text
    • http://generatorsale.ru/atal_bihari_vajpayee_information_in_marathix0i6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_6020775a34879.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/sezokufelidoginuf.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/hcjgxb7/22113809435.pdfIn PDF document text
    • http://tadosuzewamu.medianewsonline.com/fomimukinamozo.pdfIn PDF document text
    • http://datab.vip/8998003435b0qdb.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/631634986521g7r7.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/consumer_protection_act_amendment_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473638/normal_5ffd7dd8e20bb.pdfIn PDF document text
    • http://detomebokiv.iblogger.org/vonubuzaratuno.pdfIn PDF document text
    • http://help-verification.com/galvin_green_paclite_size_guideaw7kd.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/ifhjUpZ/highway_395_oregon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pomewegipezu.rf.gd/a_place_to_call_home_book.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_09c0024c8c984812841e37ecb47734d6.pdf?index=trueIn PDF document text
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_d6db0047703b42159305edeb34fd50af.pdf?index=trueIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_ce5fe7e082c24247a6d3a1b835d1c2f7.pdf?index=trueIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/47395361382.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76F 5492 bytes
SHA-256: 134864f7eeb9b12b313fac77c5a4172e21dc0ef3489916b6445f5e8f5b3b2f98
font_01_sfnt_off0000da55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA55 10480 bytes
SHA-256: 59ece72097beb74f110aec4406c1013a45b78868b9a58c6546576c903724bd65

Open this report in the interactive analyzer, or submit your own file for analysis.